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d8fa2031fa
The TDX support will need the "suppress #VE" bit (bit 63) set as the initial value for SPTE. To reduce code change size, introduce a new macro SHADOW_NONPRESENT_VALUE for the initial value for the shadow page table entry (SPTE) and replace hard-coded value 0 for it. Initialize shadow page tables with their value. The plan is to unconditionally set the "suppress #VE" bit for both AMD and Intel as: 1) AMD hardware uses the bit 63 as NX for present SPTE and ignored for non-present SPTE; 2) for conventional VMX guests, KVM never enables the "EPT-violation #VE" in VMCS control and "suppress #VE" bit is ignored by hardware. No functional change intended. Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com> Message-Id: <acdf09bf60cad12c495005bf3495c54f6b3069c9.1705965635.git.isaku.yamahata@intel.com> [Remove unnecessary CONFIG_X86_64 check. - Paolo] Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com> Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.